RESA has worked in the following countries:


bullet Angola bullet Botswana bullet Burkina Faso bullet DRC
bullet Eritrea bullet Ethiopia bullet Ghana bullet Guinea
bullet Ivory Coast bullet Lesotho bullet Madagascar bullet Mali
bullet Mauritania bullet Mauritius bullet Mozambique bullet Namibia
bullet Nigeria bullet Sierra Leone bullet Sudan bullet Swaziland
bullet Tanzania bullet Uganda bullet Zambia bullet Zimbabwe






Cut side widening, N1 Freeway, Johannesburg

Client: SANRAL

Consulting Engineers: SSI / Jones and Wagener

Contractor: WBHO

As part of the Gauteng freeway improvement project, additional lanes required excavation of the existing cut slope, and the construction of a TerraNailTM structure. This technique consists of the construction of a Reinforced Earth® retaining wall in front of the excavated cut face stabilized by nailing. The geosynthetic reinforcements link the Reinforced Earth® facing to the soil nail wall through special connections.

Cut side widenings



Project details:

Total area: 6,000 m²

Length: 2,400 m

Maximum height: 8,5 m

Reinforcement: GeoStrap® 5 Grade 50 kN direct connection


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